package com.fysports.web.kit.umeditor;

import com.google.common.collect.Maps;
import com.jfinal.kit.PropKit;
import com.fysports.web.config.AppConst;
import com.fysports.web.kit.commons.DateTimeKit;
import com.fysports.web.kit.commons.StringKit;
import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileUploadBase.InvalidContentTypeException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;


/**
 * UEditor文件上传辅助类
 */
public class Uploader {
    // 输出文件地址
    private String url = "";
    // 上传文件名
    private String fileName = "";
    // 状态
    private String state = "";
    // 文件类型
    private String type = "";
    // 原始文件名
    private String originalName = "";
    // 文件大小
    private long size = 0;

    private HttpServletRequest request = null;
    private String title = "";

    // 保存路径(modulename)
    private String savePath = "upload";
    // 文件允许格式
    private String[] allowFiles =
            { ".rar", ".doc", ".docx", ".zip", ".pdf", ".txt", ".swf", ".wmv", ".gif", ".png", ".jpg",
              ".jpeg", ".bmp" };
    // 文件大小限制，单位KB
    private int maxSize = 20000;

    private HashMap<String, String> errorInfo = Maps.newHashMap();

    // 业务uuid
    private String bizuuid;

    public Uploader(HttpServletRequest request) {
        this.request = request;
        HashMap<String, String> tmp = this.errorInfo;
        tmp.put("SUCCESS", "SUCCESS"); //默认成功
        tmp.put("NOFILE", "未包含文件上传域");
        tmp.put("TYPE", "不允许的文件格式");
        tmp.put("SIZE", "文件大小超出限制");
        tmp.put("ENTYPE", "请求类型ENTYPE错误");
        tmp.put("REQUEST", "上传请求异常");
        tmp.put("IO", "IO异常");
        tmp.put("DIR", "目录创建失败");
        tmp.put("UNKNOWN", "未知错误");

    }


    public void upload() throws Exception {
        boolean isMultipart = ServletFileUpload.isMultipartContent(this.request);
        if (!isMultipart) {
            this.state = this.errorInfo.get("NOFILE");
            return;
        }
        DiskFileItemFactory dff = new DiskFileItemFactory();
        String savePath = this.getFolder(this.savePath);
        dff.setRepository(new File(savePath));
        try {
            ServletFileUpload sfu = new ServletFileUpload(dff);
            sfu.setSizeMax(this.maxSize * 1024);
            sfu.setHeaderEncoding("utf-8");
            FileItemIterator fii = sfu.getItemIterator(this.request);
            while (fii.hasNext()) {
                FileItemStream fis = fii.next();
                if (!fis.isFormField()) {
                    this.originalName = fis.getName()
                            .substring(fis.getName().lastIndexOf(System.getProperty("file.separator")) + 1);
                    if (!this.checkFileType(this.originalName)) {
                        this.state = this.errorInfo.get("TYPE");
                        continue;
                    }
                    this.fileName = this.getName(this.originalName);
                    this.type = this.getFileExt(this.fileName);
                    this.url = savePath + "/" + this.fileName;
                    BufferedInputStream in = new BufferedInputStream(fis.openStream());
                    File file = new File(this.getPhysicalPath(this.url));
                    FileOutputStream out = new FileOutputStream(file);
                    BufferedOutputStream output = new BufferedOutputStream(out);
                    Streams.copy(in, output, true);
                    this.state = this.errorInfo.get("SUCCESS");
                    this.size = file.length();
                    //UE中只会处理单张上传，完成后即退出
                    break;
                }
                else {
                    String fname = fis.getFieldName();
                    //只处理title，其余表单请自行处理
                    if (!fname.equals("pictitle")) {
                        continue;
                    }
                    BufferedInputStream in = new BufferedInputStream(fis.openStream());
                    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                    StringBuffer result = new StringBuffer();
                    while (reader.ready()) {
                        result.append((char) reader.read());
                    }
                    this.title = new String(result.toString().getBytes(), "utf-8");
                    reader.close();

                }
            }
        }
        catch (SizeLimitExceededException e) {
            this.state = this.errorInfo.get("SIZE");
        }
        catch (InvalidContentTypeException e) {
            this.state = this.errorInfo.get("ENTYPE");
        }
        catch (FileUploadException e) {
            this.state = this.errorInfo.get("REQUEST");
        }
        catch (Exception e) {
            this.state = this.errorInfo.get("UNKNOWN");
        }
    }


    /**
     * 接受并保存以base64格式上传的文件
     *
     * @param fieldName
     */
    public void uploadBase64(String fieldName) {
        String savePath = this.getFolder(this.savePath);
        String base64Data = this.request.getParameter(fieldName);
        this.fileName = this.getName("test.png");
        this.url = savePath + "/" + this.fileName;
        try {
            File outFile = new File(this.getPhysicalPath(this.url));
            OutputStream ro = new FileOutputStream(outFile);
            byte[] b = StringKit.decodeBase64(base64Data);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            ro.write(b);
            ro.flush();
            ro.close();
            this.state = this.errorInfo.get("SUCCESS");
        }
        catch (Exception e) {
            this.state = this.errorInfo.get("IO");
        }
    }


    /**
     * 文件类型判断
     *
     * @param fileName
     * @return
     */
    private boolean checkFileType(String fileName) {
        Iterator<String> type = Arrays.asList(this.allowFiles).iterator();
        while (type.hasNext()) {
            String ext = type.next();
            if (fileName.toLowerCase().endsWith(ext)) {
                return true;
            }
        }
        return false;
    }


    /**
     * 获取文件扩展名
     *
     * @return string
     */
    private String getFileExt(String fileName) {
        return fileName.substring(fileName.lastIndexOf("."));
    }


    /**
     * 依据原始文件名生成新文件名
     *
     * @return
     */
    private String getName(String fileName) {
        return DateTimeKit.format(new Date(),"yyMMddHHmmssS") + this.getFileExt(fileName);
    }


    /**
     * 根据字符串创建本地目录 并按照日期建立子目录返回
     *
     * @param path modulename 不带反斜杠
     * @return
     */
    private String getFolder(String path) {
//        SimpleDateFormat formater = new SimpleDateFormat("yyyyMMdd");
//        path += "/" + formater.format(new Date());
        /*添加业务标志*/
        path = File.separator+path+File.separator+bizuuid;
        File dir = new File(this.getPhysicalPath(path));
        if (!dir.exists()) {
            try {
                dir.mkdirs();
            }
            catch (Exception e) {
                this.state = this.errorInfo.get("DIR");
                return "";
            }
        }
        return path;
    }


    /**
     * 根据传入的虚拟路径获取物理路径
     *
     * @param path
     * @return
     */
    private String getPhysicalPath(String path) {
        /**
         * 考虑到存放网站目录，防止重新部署时覆盖文件的误操作
         * 将上传文件保存到其他非站点目录
         */
        String basePath = PropKit.use(AppConst.CONFIG_SYSTEM).get(AppConst.UPLOAD_TMPPATH);
        return basePath + "/" + path;
    }


    public void setSavePath(String savePath) {
        this.savePath = savePath;
    }


    public void setAllowFiles(String[] allowFiles) {
        this.allowFiles = allowFiles;
    }


    public void setMaxSize(int size) {
        this.maxSize = size;
    }


    public long getSize() {
        return this.size;
    }


    public String getUrl() {
        return this.url;
    }


    public String getFileName() {
        return this.fileName;
    }


    public String getState() {
        return this.state;
    }


    public String getTitle() {
        return this.title;
    }


    public String getType() {
        return this.type;
    }


    public String getOriginalName() {
        return this.originalName;
    }


    public String getBizuuid() {
        return bizuuid;
    }


    public void setBizuuid(String bizuuid) {
        this.bizuuid = bizuuid;
    }
}
